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#!/usr/bin/env python
"""New and improved bot, OPTIMISED!!"""
import random
import sys
EMPTY_TILE = '.'
APPLE_TILE = '*'
WIDTH, HEIGHT, SNAKE_BODY = raw_input().split()
WIDTH = int(HEIGHT)
HEIGHT = int(HEIGHT)
SNAKE_BODY = SNAKE_BODY.lower()
SNAKE_HEAD = SNAKE_BODY.upper()
HEADX = None
HEADY = None
def get_cell(board, x, y):
if x < 0 or x >= WIDTH or y < 0 or y >= HEIGHT:
raise KeyError, 'out of range.'
return board[y][x]
BOARD = []
for y in xrange(HEIGHT):
row = raw_input()
for x, char in enumerate(row):
if char == SNAKE_HEAD:
HEADX = x
HEADY = y
BOARD.append(row)
md_two = {
(-1, 0, 'l'): ((-2, 0), (-1, 1), (-1, -1)),
(0, -1, 'u'): ((-1, -1), (1, -1), (0, -2)),
(1, 0, 'r'): ((2, 0), (1, 1), (1, -1)),
(0, 1, 'd'): (((0, 2), (-1, 1), (1, 1))),
}
max_score = 0
max_moves = []
for (dx, dy, move), adj in md_two.items():
score = 0
try:
square = get_cell(BOARD, HEADX + dx, HEADY + dy)
except KeyError:
continue
if square == APPLE_TILE:
score += 2
elif square != EMPTY_TILE:
continue # Definitely cannot move here.
for ddx, ddy in adj:
try:
square = get_cell(BOARD, HEADX + ddx, HEADY + ddy)
except KeyError:
score -= 1
continue
if square == APPLE_TILE:
score += 2
elif square == EMPTY_TILE:
score += 1
elif square == SNAKE_BODY:
score -= 1
elif square.isupper():
score += 3
if score == max_score:
max_moves.append(move)
elif score > max_score:
max_score = score
max_moves = [move]
if max_moves:
print random.choice(max_moves)
else:
print 'U' # Suicide!
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